
- Author: Christopher D Duncan
- Language: English
- Year: 2010

- Author: Christopher D Duncan
- Language: English
- Year: 2010

- Author: Christopher D Duncan
- Language: English
- Year: 2010

- Author: Susan Scott Christopher J. Duncan
- Language: English
- Year: 2002

- Author: Susan Scott Christopher J. Duncan
- Language: English
- Year: 2001